| Title |
Long-chain polyamide covalent adaptable networks based on renewable ethylene brassylate and disulfide exchange |
| ID_Doc |
8144 |
| Authors |
Pronoitis, C; Hakkarainen, M; Odelius, K |
| Title |
Long-chain polyamide covalent adaptable networks based on renewable ethylene brassylate and disulfide exchange |
| Year |
2021 |
| Published |
Polymer Chemistry, 12.0, 39 |
| DOI |
10.1039/d1py00811k |
| Abstract |
Conventional thermosets cannot be recycled once they reach their end-of-life creating unavoidable waste. Covalent adaptable networks (CANs) are a promising circular solution as they can be reprocessed by conventional techniques employed for processing thermoplastics. In this work, strong and chemically resistant, long-chain polyamide (PA) CANs were developed by introducing intrinsically reactive disulfides in PA networks. Following a solvent-free strategy and utilizing ethylene brassylate, a renewable cyclic diester, our approach brings together the high strength and chemical resistance of long-chain, crosslinked PAs with the reprocessability of dynamic networks in a sustainable fashion. The structure of the PA CANs was elucidated by X-ray diffraction analysis, and the effect of the disulfides on the thermal, mechanical, viscoelastic and dynamic properties was evaluated. The PA CANs had high gel content (86-98%) and they were reprocessable over three grinding-compression molding cycles, retaining their strength (15-20 MPa), crosslink density and gel content. They exhibited rapid stress relaxation with relaxation times as low as 1.06 s and were healable within 5 min. The long-chain PA CANs are easy to prepare and feature several elements of sustainable materials design, highly valued in plastics' circular economy. |
| Author Keywords |
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| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000706345600001 |
| WoS Category |
Polymer Science |
| Research Area |
Polymer Science |
| PDF |
https://pubs.rsc.org/en/content/articlepdf/2021/py/d1py00811k
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